80.243.236.0/22

AS42908 · ORIGINAL AS CZ-NORDICTELECOMREGIONAL

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Summary

Country	Czechia
Domain	o2.cz
ASN	AS42908
Registry	RIPE
ID	CZ-CZNET-20180814

WHOIS Details

inetnum:        80.243.236.0 - 80.243.239.255
netname:        CZ-CZNET-20180814
country:        CZ
org:            ORG-STaN1-RIPE
admin-c:        VAKO1-RIPE
tech-c:         CZO2-RIPE
status:         ALLOCATED PA
mnt-by:         AS5610-MTN
mnt-by:         RIPE-NCC-HM-MNT
created:        2025-04-01T07:33:38Z
last-modified:  2025-04-01T07:33:38Z
source:         RIPE
abuse-email:    abuse@o2.cz
abuse-c:        AR14410-RIPE
abuse-org:      ORG-STaN1-RIPE

organisation:   ORG-STaN1-RIPE
org-name:       O2 Czech Republic, a.s.
country:        CZ
org-type:       LIR
address:        Za Brumlovkou 266/2
address:        140 22
address:        Praha 4 - Michle
address:        CZECH REPUBLIC
phone:          +420 2 71466184
fax-no:         +420 2 71464414
e-mail:         marek.vogel@o2.cz
admin-c:        VAKO1-RIPE
admin-c:        MV96-RIPE
admin-c:        HVJI1-RIPE
tech-c:         CZO2-RIPE
abuse-c:        AR14410-RIPE
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        AS5610-MTN
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         AS5610-MTN
created:        2004-04-17T11:04:17Z
last-modified:  2020-12-16T12:31:56Z
source:         RIPE
abuse-email:    abuse@o2.cz
abuse-c:        AR14410-RIPE
abuse-org:      undefined

role:           5610-Tech-and-Admin
address:        Za Brumlovkou 266/2
address:        Praha 4 - Michle, PSC 140 22
e-mail:         router@o2.cz
nic-hdl:        CZO2-RIPE
admin-c:        VAKO1-RIPE
admin-c:        MV96-RIPE
admin-c:        HVJI1-RIPE
tech-c:         VAKO1-RIPE
tech-c:         HVJI1-RIPE
abuse-mailbox:  abuse@o2.cz
org:            ORG-STaN1-RIPE
mnt-by:         AS5610-MTN
created:        2016-02-18T09:58:30Z
last-modified:  2018-04-20T10:44:21Z
source:         RIPE

person:         Vaclav Kordula
address:        O2 Czech Republic, a.s.
address:        Za Brumlovkou 266/2
address:        Praha 4 - Michle, PS? 140 22
address:        Czech Republic
phone:          +420 2 714668845
e-mail:         vaclav.kordula@o2.cz
nic-hdl:        VAKO1-RIPE
notify:         vaclav.kordula@o2.cz
mnt-by:         AS5610-MTN
created:        1970-01-01T00:00:00Z
last-modified:  2016-02-12T13:32:30Z
source:         RIPE

route:          80.243.236.0/22
origin:         AS42908
mnt-by:         mnt-nordictelecom
mnt-by:         AS5610-MTN
created:        2019-10-30T17:25:43Z
last-modified:  2025-04-01T10:43:50Z
source:         RIPE

Nearby Ranges

BGP prefixes that overlap with 80.243.0.0/16

Range	ASN	Company	Num of IPs
80.243.32.0/19	AS21413	Envia Tel GmbH	8,192
80.243.144.0/20	AS49332	Lanet Network Ltd	4,096
80.243.112.0/20	AS31027	GlobalConnect A/S	4,096
80.243.0.0/20	AS24680	JS Company Compnet	4,096
80.243.80.0/20	AS2860	NOS COMUNICACOES, S.A.	4,096
80.243.96.0/20	AS29321	O2 Czech Republic, a.s.	4,096
80.243.208.0/20	AS35635	Net Jump GmbH	4,096
80.243.240.0/20	AS20776	Outremer Telecom SAS	4,096
80.243.176.0/20	AS20860	IOMART MANAGED SERVICES LIMITED	4,096
80.243.160.0/20	AS21013	eww ag	4,096
80.243.192.0/20	AS21336	INFORENT GmbH	4,096
80.243.152.0/21	AS49332	Lanet Network Ltd	2,048
80.243.16.0/21	AS6079	Private Customer	2,048
80.243.24.0/21	AS6079	Private Customer	2,048
80.243.144.0/21	AS49332	Lanet Network Ltd	2,048
80.243.224.0/22	AS211582	ecomDATA GmbH	1,024
80.243.230.0/23	AS9009	Montreal	512
80.243.228.0/24	AS48031	Proline IT Ltd	256
80.243.229.0/24	AS209372	Australian users	256
80.243.235.0/24	AS200287	BOBAN CAKIC trading as INTERNET SERVIS IBS	256
80.243.234.0/24	AS200287	BOBAN CAKIC trading as INTERNET SERVIS IBS	256
80.243.233.0/24	AS200287	BOBAN CAKIC trading as INTERNET SERVIS IBS	256
80.243.232.0/24	AS200287	BOBAN CAKIC trading as INTERNET SERVIS IBS	256

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

Read more

Pingable IPs

72 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
80.243.236.7	AS42908 ORIGINAL AS CZ-NORDICTELECOMREGIONAL	`3.86ms` from Prague, CZ
80.243.238.80	AS42908 ORIGINAL AS CZ-NORDICTELECOMREGIONAL	`5.14ms` from Prague, CZ
80.243.239.45	AS42908 ORIGINAL AS CZ-NORDICTELECOMREGIONAL	`0.87ms` from Prague, CZ
80.243.237.13	AS42908 ORIGINAL AS CZ-NORDICTELECOMREGIONAL	`3.88ms` from Prague, CZ

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
54.174.39.54	AS14618 Amazon.com, Inc.	`0.51ms` from Ashburn, US
20.115.125.6	AS8075 Microsoft Corporation	`0.38ms` from Ashburn, US
34.78.22.182	AS396982 Google LLC	`0.13ms` from Brussels, BE
134.255.95.22	AS5483 Magyar Telekom Plc.	`0.94ms` from Budapest, HU
24.9.234.54	AS7922 Comcast Cable Communications, LLC	`2.27ms` from Denver, US
71.237.33.150	AS7922 Comcast Cable Communications, LLC	`2.27ms` from Denver, US
217.225.44.230	AS3320 Deutsche Telekom AG	`4.79ms` from Frankfurt am Main, DE
212.143.84.22	AS1680 Cellcom Fixed Line Communication L.P	`0.57ms` from Haifa, IL
112.124.149.166	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`2.10ms` from Hangzhou, CN
183.80.154.134	AS18403 FPT Telecom Company	`4.74ms` from Ho Chi Minh City, VN
39.63.167.22	AS17557 Pakistan Telecommunication Company Limited	`3.54ms` from Islamabad, PK
5.83.146.22	AS214564 Frostbyte Networks	`0.20ms` from Johannesburg, ZA
85.57.54.230	AS12479 Orange Espagne SA	`9.45ms` from Madrid, ES
200.9.156.6	AS270666 VITTIA S.A.	`6.90ms` from Osasco, BR
109.219.172.6	AS3215 Orange S.A.	`10.93ms` from Paris, FR
97.136.39.134	AS6167 Verizon Business	`11.96ms` from San Jose, US
189.133.167.102	AS8151 UNINET	`8.55ms` from Santiago de Queretaro, MX
73.59.115.134	AS7922 Comcast Cable Communications, LLC	`5.31ms` from Seattle, US
124.56.110.6	AS17858 LG POWERCOMM	`7.70ms` from Seoul, KR
182.21.13.70	AS10010 TOKAI Communications Corporation	`5.39ms` from Tokyo, JP
93.180.177.86	AS12741 Netia SA	`4.72ms` from Warsaw, PL
100.26.185.70	AS14618 Amazon.com, Inc.	`0.54ms` from Ashburn, US
47.42.5.22	AS20115 Charter Communications LLC	`8.52ms` from Atlanta, US
185.134.180.102	AS27552 TowardEX Technologies International, Inc.	`0.32ms` from Boston, US
37.85.21.38	AS3320 Deutsche Telekom AG	`13.56ms` from Frankfurt am Main, DE

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

traceroute -a -n -q1 -f4 80.243.237.13

traceroute to 80.243.237.13 (80.243.237.13): 64 hops max, 52 byte packets

4 [AS5610] 194.228.77.51 0.993 ms

5 [AS42908] 217.197.156.1 0.78 ms

6 [AS42908] 80.243.237.13 4.019 ms

Measurement taken from

IPinfo ProbeNet in Prague, CZ

On December 28th 2025

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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